The concentration of CO in air is determined by passing a known volume of air through a tube that contains I2O5 , forming CO2 and I2 . The I2 is removed from the tube by distilling it into a solution that contains an excess of KI, producing I3 - . The I3 - is titrated with a standard solution of Na2 S2O3 . In a typical analysis a 4.79-L sample of air is sampled as described here, requiring 7.17 mL of 0.00329 M Na2 S2O3 to reach the end point. If the air has a density of 1.23 × 10–3 g/mL, determine the parts per million CO in the air
The concentration of CO in air is determined by passing a known volume of air through a tube that contains I2O5 , forming CO2 and I2 . The I2 is removed from the tube by distilling it into a solution that contains an excess of KI, producing I3 - . The I3 - is titrated with a standard solution of Na2 S2O3 . In a typical analysis a 4.79-L sample of air is sampled as described here, requiring 7.17 mL of 0.00329 M Na2 S2O3 to reach the end point. If the air has a density of 1.23 × 10–3 g/mL, determine the parts per million CO in the air
Chapter13: Titrations In Analytical Chemistry
Section: Chapter Questions
Problem 13.20QAP
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Question
The concentration of CO in air is determined by passing a
known volume of air through a tube that contains I2O5
,
forming CO2
and I2
. The I2 is removed from the tube by
distilling it into a solution that contains an excess of KI,
producing I3
-
. The I3
-
is titrated with a standard solution of
Na2
S2O3
. In a typical analysis a 4.79-L sample of air is
sampled as described here, requiring 7.17 mL of 0.00329
M Na2
S2O3 to reach the end point. If the air has a density
of 1.23 × 10–3 g/mL, determine the parts per million CO in
the air
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